Winch



g- 1969 v. I. PRIKHODKO ET AL 3,460,807

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Filed Feb. 21. 1967 2 Sheets-Shee t 1 1969 v. I. PRIKHODKO ETAL3,460,807

WINCH 2 Sheets-Sheet 2 Filed Feb. 21. 1967 OUOUOOO 0 0090009 Fig. 3

United States Patent 3,460,807 WTNCH Viktor Ivanovieh Pri thodko,poselok imeni M. Gorkogo, ulitsa Gagarina, 2, lcv. 19, and BorisVasilievich Pankov, poseloir irneni M. Gorkogo, ulitsa Lornonosova, 18,kv. 13, both of Khabarovsk, U.S.S.R.

Fitted Feb. 21, 1967, Ser. No. 617,647 Int. Cl. B66d 1/26; F16h 3/44 US.Cl. 254-185 11 Claims ABSTRACT OF THE DISCLOSURE A planetary reductiongear built into the drum of a single-drum winch. The gear includes sunwheels of different diameters, interconnected planet pinions on a commoncarrier and engaged with the sun wheels, epicycles of differentdiameters respectively connected to the drum and to the winch frame andrespectively engaged with the sun wheels, a winch drive, and a couplingselectively engaged between the drive and one of the sun wheels.

Main disadvantages of the known reduction gears of Y the conventionaldesign lie in a restricted application of said reduction gears due tothe availability of a single gear speed; enlarged overall dimensions dueto a complicated design of a pinion carrier, and unreliable operationdue to a complicated design of the clutch coupling.

It is, therefore, an object of the present invention to eliminate saiddisadvantages and develop a planetary reduction gear employed in a winchand built into the drum thereof, said reduction gear featuring twospeeds of rotation with a small gear ratio of one speed to the other,simple in design and reliable in operation.

According to the invention, said object is accomplished owing to thefact that two planet pinions of the reduction gear are interconnectedand mounted on a common pinion carrier. Said planet pinions are inconstant mesh with two sun wheels of different diameters on one side andwith epicycles on the other. A claw coupling is installed between thesun wheels and the winch drive with the purpose to alternatively engagesaid sun wheels. One of the epicycles is connected to the winch drum,whereas the other to the winch frame.

In an embodiment of the reduction gear, according to the invention, inthe case the winch possesses two drums, that is the main and theauxiliary one, two planet pinions, interconnected and arranged on acommon pinion carrier, are provided constantly meshing two sun wheels ofdif- 3,460,807 Patented Aug. 12, 1969 ferent diameters on one side andepicycles on the other; a claw coupling is installed between the sunwheels and the winch drive to alternatively engage said sun wheels,whereas the second epicycle is connected to the auxiliary drum.

In the preferred embodiment of the reduction gear, according to theinvention, it is desirable that the claw coupling should be providedwith three claw half-couplings, two of which are rigidly installed onthe sun wheel shafts while the third is loosely set on the drive shaft,a movable half-coupling alternatively coming in mesh with stationaryhalf-couplings through an intermediate member made as a sleeve with tworows of claws, one of said rows being constantly in mesh with the clawsof the movable half-coupling. It is desirable that said meshing shouldprovide for a certain clearance, whereas the claws should be articulatedto one another by means of a ring passing through openings in saidclaws.

It is expedient that one of the pinion carrier journals, installedinside the hollow shaft of one of the epicycles, should be arranged inthe bearing coaxially with the bearing of the hollow shaft of saidepicycle and the planes of symmetry of both bearings normal to the axisof the hollow shaft should be matched.

It is desirable to place a sleeve in the middle portion of the pinioncarrier of the reduction gear coaxially therewith between the planetpinions, which is made with the help of radial stays interposed betweensaid planet pinions, with a part of supporting bearings of the sun wheelshafts located inside the sleeve.

It is expedient that movable couplings be used to connect the epicycleseither to the winch drum and frame or to two drums.

In the case of a double-drum winch the reduction gear thereof should beadvantageously built into the main drum, whereas the auxiliary drumshould be installed on a journal of the main drum to preclude the effectof the bending moment upon the shaft of the epicycle the auxiliary drumis connected to.

The winch, according to the invention, is designed to provide for twospeeds of rotation, the ratios between said speeds being within therange from 111.2 to 1:2.

Exemplary embodiments of the winch designs, according to the invention,are given in the accompanying drawings, wherein:

FIG. 1 is a longitudinal section of a single-drum winch according to theinvention;

FIG. 2 is a section taken on line I-I of FIG. 1; and

FIG. 3 is a mechanical diagram of a double-drum winch according to theinvention.

The winch comprises a planetary reduction gear 1 (FIG. 1) built into itsdrum 2, said drum rotating in bearings 3 and 4. A stationary epicycle 5of the reduction gear 1 is connected to a winch frame 9 through amovable coupling 6, a hollow shaft 7 and a splined disk 8.

A planet pinion 10 of a larger diameter made integral with a planetpinion 11 of a smaller diameter meshes stationary epicycle 5. The blocksof planet pinions 10 and 11 are fixed on small shafts 12 which rotate inbearings 13. Bearings 13 are mounted in a pinion carrier 14 rotating inbearings 15 and 16. A shaft 19 is installed in bearings 17 and 18 insidepinion carrier 14, said shaft being made integral with a sun wheel 20 ofa smaller diameter which is in constant mesh with planet pinions 1tInstalled concentrically to shaft 19 is a hollow shaft 21 made integralwith a sun wheel 22 of a larger diameter, said wheel being in constantmesh with planet pinion 11. Shaft 21 rotates in bearings 23 and 24. Clawhalf-couplings 25 and 26 are fixed at the left-hand ends of shafts 19and 21 with the purpose to alternatively engage sun wheels 20 and 22with an electric motor 27 through a movable claw half-coupling 28 and anintermediate member 29.

Intermediate member 29 is essentially a sleeve with two rows of claws,some of said claws being in constant mesh with the claws of movablehalf-coupling 28, said meshing provides for a certain clearance, whereasthe engaging claws are articulated to one another by means of a ring 30passing through openings in said claws.

An output member of reduction gear, that is planet pinion 11, through anepicycle 31 and a movable claw coupling 32 and which is rigidlyconnected to the drum 2, imparts rotation to drum 2 of the winch.

The ratio of the diameters of the reduction gear wheels is so selectedthat the ratios of the drum speeds of rotation are applicable within therange up to 1:2 with either of the sun wheels being engaged.

Installed inside hollow shaft 7 is a journal 33 of pinion carrier 14,said journal being placed in the bearing 16 coaxially with a bearing 34of hollow shaft 7, the longitudinal planes of symmetry of both bearingsbeing matched. This fact eliminates the harmful run-out of the shaftsand reduction gear wheels.

To increase the reliability of sun wheels 20 and 22 a number of theirbearings, that is bearings 17 and 24, is

located inside a sleeve 35 (FIGS. 1 and 2) installed between the blocksof planet pinions and 11 coaxially with pinion carrier 14, said sleevebeing welded to stays 36. Stays 36 are in turn welded to longitudinallinks 37 (FIG. 2) of cheeks of pinion carrier 14. a

The movable half-coupling 28 is capable of shifting along a splinedshaft 38 by means of the yoke of the winch gearshift lever (not shown inthe drawings).

Unlike the single-drum winch, the double-drum one (FIG. 3), according tothe invention, is provided with an auxiliary drum 39 installed on ajournal 40 of a main drum 41 to preclude the effect of the bendingmoment upon a shaft 42 of an epicycle 43 to which drum 39 is connected.

To make the double-drum winch operative it is required that drums 41 and39 are engaged non-simultaneously. To this end provision is made in drum41 for a brake pulley 44, whereas drum 39 is provided with a movablestop 45.

The location of auxiliary drum 39 on journal 40 enables shaft 42 of acomparatively small diameter to be used, which considerably reduces theoverall dimensions of the winch.

What we claim is:

1. A planetary reduction gear for a winch including a frame and a singledrum, the gear being located within said drum and comprising: two sunwheels of different diameters; a pinion carrier; two interconnectedplanet pinions mounted in common on said pinion carrier and constantlyin mesh with said sun wheels; two epicycles of diiferent diameters, oneof which is connected to the Winch drum and is in constant mesh with oneof said sun wheels, the other epicycle being connected to the winchframe and being in constant mesh with the other sun wheel; a drive forsaid winch; and a claw coupling to alternatively engage one of said sunwheels, said coupling being interposed between said wheels and the winchdrive.

2. A planetary reduction gear for a winch including a frame and main andauxiliary drums, said gear being located in the-main drum andcomprising: two sun wheels of different diameters; a pinion carrier; twointerconnected planet pinions mounted in common on said pinion carrierand constantly in mesh with said sun wheels; two

epicycles of different diameters, one of which is connected to the maindrum of the winch and is in constant mesh with one of said sun wheels,the other epicycle being connected to the auxiliary drum and being inconstant mesh with the other sun wheel; a drive for said Winch; a clawcoupling to alternatively engage one of said sun wheels, said couplingbeing interposed between said sun wheels and the winch drive; and brakesto alternatively lock either of said drums in position with respect tothe winch frame.

3. A planetary reduction gear as claimed in claim 1, comprising shaftsfor the sun wheels and drive, an intermediate member, and a ring, andwherein said claw coupling comprises three claw half-couplings which arerespectively rigidly installed on the shafts of said sun wheels andloosely set on the shaft of said drive, the loosely set half-couplingbeing adapted for coming alternatively into mesh with either of saidrigidly mounted half-couplings through said intermediate member, saidintermediate member including a sleeve including two rows of claws, someof the latter said claws being in constant mesh with the claws of theloosely set half-coupling, the latter said mesh being provided withclearance, the engaging claws being articulated to one another by saidring, said ring passing through openings provided in said claws.

4. A planetary reduction gear as claimed in claim 2, comprising shaftsfor the sun wheels and drive, an intermediate member, and a ring, andwherein said claw coupling comprises three claw half-couplings which arere spectively rigidly installed on the shafts of said sun wheels andloosely set on the shaft of said drive, the loosely set half-couplingbeing adapted for coming alternatively into mesh with either of saidrigidly mounted half-couplings through said intermediate member, saidintermediate member including a sleeve including two rows of claws, someof the latter said claws being in constant mesh with the claws of theloosely set half-coupling, the latter said mesh being provided withclearance, the engaging claws being articulated to one another by meansof said ring, said ring passing through openings provided in said claws.

5. A planetary reduction gear as claimed in claim 1, comprising journalsfor said pinion carrier, a hollow shaft for one of said epicycles, abearing for said hollow shaft, and bearings for said journals, one ofthe journals of said pinion carrier being mounted inside said hollowshaft of said one of said epicycles and being located in one of thelatter said bearings which is coaxially disposed with the hollow shaftbearing of said epicycle, the planes of symmetry of both said bearingsnormal to said hollow shaft being matched.

6. A planetary reduction gear as claimed in claim 2, comprising journalsfor said pinion carrier, a hollow shaft for one of said epicycles, abearing for said hollow shaft, and bearings for said journals, one ofthe journals of said pinion carrier being mounted inside said hollowshaft of said one of said epicycles and being located in one of thelatter said bearings which is coaxially disposed with the hollow shaftbearing of said epicycle, the planes of symmetry of both said bearingsnormal to said hollow shaft being matched.

7. A planetary reduction gear as claimed in claim 1, comprising asleeve, radial stays, and bearings for said sun wheels, said sleevebeing supported in the middle of said pinion carrier coaxially therewithand between said planet pinion by said radial stays, said sleeveincluding part of a shaft supporting said bearings of said sun wheels.

8. A planetary reduction gear as claimed in claim 2, comprising asleeve, radial stays, and bearings for said sun wheels, said sleevebeing supported in the middle of said pinion carrier coaXially therewithand between said planet pinions by said radial stays, said sleeveincluding part of a shaft supporting said bearings of said sun wheels.

9. A planetary reduction gear as claimed in claim 1, comprising movablecouplings and wherein said epicycles are connected to said drum and tosaid winch frame through said movable couplings.

10. A planetary reduction gear as claimed in claim 2, comprising movablecouplings and wherein said epicycles are connected to said drum and tosaid winch frame through said movable couplings.

11. A planetary reduction gear as claimed in claim 2, comprising a jointmember, and a hollow journal for said main drum, and wherein one of saidepicycles is connectcd to said auxiliary drum through said joint member,said joint member including a shaft mounted inside said hollow journalof said main drum, said journal accommodating said auxiliary drum.

References Cited UNITED STATES PATENTS 0 EVON C. BLUNK, Primary ExaminerHARVEY C. HORNSBY, Assistant Examiner US. Cl. X.R.

